Re: [Qgis-user] Upsampling TIN

2019-10-10 Thread Saber Razmjooei
Hi, If you want to see your TIN as raw data, without interpolation and conversion to gridded format, best to have it supported as a "mesh layer": https://docs.qgis.org/3.4/en/docs/user_manual/working_with_mesh/mesh_properties.html To add support for it, you need to have it in MDAL:

Re: [Qgis-user] Upsampling TIN

2019-10-04 Thread Falk Huettmann
Hi, I agree with Barend and Nicolas here. It's a typical and essential question that we get all the time, like, can we re-grid and subsample pixels ? =>You can, technically, but you stay just within the same data, and thus, create nothing new or meaningful. In other words, it should not be done.

Re: [Qgis-user] Upsampling TIN

2019-10-04 Thread Nicolas Cadieux
Hi, You cannot invent new data between point without doing an interpolation. Your choice of interpolation will determine the quality of this data. The only way I can think of is to create a raster from this TIN. Then, resample (re-interpolated) this raster with a finer pixel and then make a

Re: [Qgis-user] Upsampling TIN

2019-10-04 Thread b.j.kob...@utwente.nl
?? a point in between what? A TIN is a set of triangles, where each corner represents an X,Y,Z point in space (on a surface usually). So where do you nwat to have and extra vertex...? Sounds like you are not wanting aq TIN in the end, but something else... Barend On 04/10/2019, 10:47,

Re: [Qgis-user] Upsampling TIN

2019-10-04 Thread joolek
Hi, I am more interested to have a point in between rather than the triangles, basically interpolate the data twice, to have an extra vertex between the existing one. J On Fri, 4 Oct 2019 at 09:23, Luigi Pirelli wrote: > IMHO tension surface simulation for example can be an application where a

Re: [Qgis-user] Upsampling TIN

2019-10-04 Thread Luigi Pirelli
IMHO tension surface simulation for example can be an application where a TIN up sample could be necessary Luigi Pirelli ** * LinkedIn: https://www.linkedin.com/in/luigipirelli * Stackexchange:

Re: [Qgis-user] Upsampling TIN

2019-10-04 Thread b.j.kob...@utwente.nl
The main question is actually: why would you want to do that? You just end up with a larger data structure (more triangles) to show exactly the same surface model. You would not have any more detail, i.e the smaller triangles inside the original large one would have exactly the same azimuth and

[Qgis-user] Upsampling TIN

2019-10-04 Thread joolek
Hi Experts, I've tried so many software's without success. Is it possible to upsample existing TIN? What I mean is for example divide each triangle into two for example. Not interpolation but somehow... subdivide or add more vertices between existing one? Thank you for all your time J